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H.*B. IVES.l

- BOLT. No. 378,067. Patented Feb. 14;.1883.

Figi f w//vfssfs.' l Muff/w02? K By Arme/vn NiTnn STATES ATENT Fries.

HOBART B. IVES, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TC H. B. IVES & CO., OF SAME PLACE.

BOLT.`

SPECIFICATION forming part of Letters Patent No. 378,067.i dated February 14, 1888. Application {ilcd December I1, i887. Serial No. 257.238. (No model.)

To aZZ whom it may concern.-

Be it known that I, HOBART B. IVEs, of the town of New Haven, in the State of Connecticut, have invented certain new and useful Improvements in Door-Bolts, of which the following is a specification.

My invention relates to a door-bolt, and is :1n-improvement in that class of door-bolts in which the lock-case is inserted in a round hole bored in the edge of the door, and the sliding bolt is operated by a crank and spring connecting-rod. In such bolts the connectingrod usually has its end bent over at right angles to the main part and is hooked or j ournaled in a hole in a crank-disk which turns in a circular seat or bearing in the case operated by the lock-key.

My improvements consist in providing a circular recess opening into and concentric with the bottom of the circular seat in which the crank disk turns and correspondingly ex tending the hook of the connecting-rod to project through the disk and into the recess, so

' cover half of the case.

that it cannot withdraw or spring out of the disk, and I also provide a stopshoulder on the face of the Wall of the crank, bearing on the side toward'the bolt, in position to engage the connecting-rod when it is o u its outer dead-center, or in alignment with the bolt and crank-center when the bolt is thrown out, and prevent the spring of the rod from carrying'it by the dead-center, as hereinafter more fully described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of my improved doorbolt', and also 'the bolt striker or socket into which the bolt projects when it is thrust out from the lock-case inthe operation of locking. Fig. 2 is a view of the lock with one-half ofv the case removed, showing the bolt mechanism in locked position, and Fig. 3 is a similar view with the parts unlocked. Fig. 4shows the main part of the shell or case with the mechanism removed. Fig..5 is a cross-section on the line 4v, Fig. 4; and Fig. 6 is a view of the Fig. 7 is a side View of the bolt mechanism,vviewed from the side opposite that shown in Figs. 2 and 3; and Fig. 8 is a plan view of the same, partly insection. Fig. 9 is a view of they operating disk or crank.

Referring to the drawings, A denotes the case of my improved door-bolt,of cylindrical shape to fit a round hole bored in the edge of a door. The case is splitjvertically on theline of its axis, forming two semicircular shells,a a2, which are fasten-ed together by a suitable screw,b, passing through one shell and screwed Each shell has a se-mi'circular when the two halves of the shell are fastened together the notches form a circular aperture for the cylindrical end d of the sliding bolt.

At the rear end of thernain shell'a2 is a circular bearing, e, adapted to receive the operatingcrank f, which turns on a horizontal axis and in a plane parallel -to the length off.l

the case. An annular shoulder, g, projects from the circular wall of the crank-bearing and forms` a seat against which the crank rests. Interior to the annular seat is a circular recess, h,veXtending from the plane vof the seat toward the outside of the case and opening from the crank-seat into the circular aperture i, through which the key 7c', for operating the bolt, is inserted.

The crank has a central rectangular hole, Z,

to receive the square shank 7c of the key, and

alsohas aperforation, m, just interior to theA annular seat g,to .receive thehookn of the connectingrod. This hook is made by bending the end vof the rod over at right angles to its main part nd the. bent-over part is made longer tha ve thickness of the disk and is extended thugh the disk into the adjacent recess h. By thus projecting from the disk the hook part of the rod is prevented from withdrawing or springing out from its journal in the disk,Which would occur if the end of the rod was flush with the back of the disk,as the disk is struck out from sheet metal and made i thin. vlt is therefore important that the rod shall project considerably through the disk, and thatthe circular recess shall be provided for it to swing in. With this construction the crank may bev made from light sheet metal, and

the size of the lock may be correspondingly reduced, for it will be seen that any increase in the length of the disk increases the size of the lock-case.

.rooy

Onlthe face of the wall of the circular bearing e, on the/side toward the outer end of the 4 case, is a projection or shoulder, g', in position to intercept the connecting-rod just as it passes its outer dead-center, andthus hold the rod in that position, with the crank-centers and the rod all in alignment with the movement of the bolt. The bolt cannot then be pushed back into the case except by the normal action of the crank. The rod. is held pressed down against the stop-shoulder g by the elasticity of the rod, which tends to spring the crank end downward, the Vtension of the rod being adjusted when made to insure this result.

It will be seen that the stop-shoulder effeetually holds the rod as it reaches its outer dead-center and prevents it from turning too far in that direction.

The face of the circular seat which holds the crankdisk is nearly in alignment with the edge of the shell a2, and the connecting-rod utherefore lies within the cover a when the parts are put together. The body s of the bolt is made flat and offset from the center line of the ease to fit between theconnecting-rod and the cover a', which is formed with two flat u seats, c2, against which the bolt hears, and isv thereby prevented from turning in the ease. The bolt is provided with a horizontal rib, e3, at the angle where the flat and cylindrical parts join, and the rib is perforatedvertically to receive the hook of the connecting-rod. This lhookis similar to the one at the opposite end of the rod. except that it stands vertical instead of horizontal, and a projection, nl, is cast on the Hat part of the bolt just the width of the rod off from the rib e3, so that when the hook ofthe rod is inserted in the rib and the rod is then turned down against the body of the bolt, where it lies normally, theprojection holds the rod in place.

The hook of the rod at the end which is fastened to the bolt, being vertical, does not oscillatein the rib, butis rigidly lixed thereto, and the rod springs out of a straight line as the crank turns. This elasticity holds the rod'down against the stop-shoulder g, or on the opposite dea d-center, where the rod is stopped by the shank of the key lc, as shown in Fig. 3, so that the bolt will always remain either in locked or .unlocked position wherever it is left.

The cover a of the case is provided with a projection, cl2, which is adapted to bear on t-he face of the crank-diskfand hold it in its seat when the two half-shells are fastened together. It also has a hole, t, for the reception of the key 7c,which thus bears in the two sides of the case and also in an eseutcheon, h, which is fastened upon the door. The striker L is fastened to the door-casing in the usual manner, and has the ordinary oblong slot, L, to

4the connecting-rod swings and adapted to receive the projecting end of the rod and permit its free rotation, for the purpose speci` fied.

2. The combination, with the sliding bolt and its operating crank or disk, of' the spring connecting-rod fastened to the bolt at one end and having its opposite end hooked or jour naled in the crank, and the case having a cir cular cavity or bearing in which the, crank turns, and a stop-shoulder projecting from the wall of the bearing on the side toward the bolt in position to engage the eonnecting-rodV on its outer dead center to hold the bolt in its locked position, substantially in the manner as specited.

HOBART B. IVES. Vtnesses.:

LoUIs A. BABoooK, CHAUNeY JoHNsoN. 

